Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-06-28
1991-05-14
Look, Edward K.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 27, 277236, 277 53, 277174, 92 86, 92142, 92165R, 92167, 92168, F16J 1500, F16J 1516, F01B 3100
Patent
active
050150006
ABSTRACT:
A rod seal for a linear hydraulic or pneumatic actuator cylinder includes a seal ring that has a bore that closely matches the diameter of the rods, proximal and distal cylindrical portions and a central annular flange. A seat in the actuator cylinder distal end assembly has proximal and distal cylindrical portions and a central void to receive the rod seal ring proximal and distal portions and central flange respectively. A radial clearance is provided so that the rod seal ring can travel radially, at least for a limited distance, while the rod passes axially through it. Static elastomeric ring seals are provided in the proximal, distal and central portions, and define pressure balancing regions. The rod seal assembly can be constructed at low cost, yet achieve a high degree of sealing with low axial friction characteristics.
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Denion Thomas
Look Edward K.
Moog Controls Inc.
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